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用PTGUI批量制作360度视频的步骤

PTgui 360 video batch stitching
PTGUI 360度视频批量拼接


Here is a short overview how to stitch 360 videos with PTgui Pro. We will add more info about PTgui, as well as other 360 video stitching solutions, as soon as they become public.



如何使用PTGUI模板:
1.Apply the template to a meaningful representative frame set of your shoot (tif or jpg) with the Freedom360 (it will not really work with other setups)
2.The frame set should contain all important elements of your scene, withadded elements to create control points in “flat” areas
3.Auto-generate control points
4.Manually generate control points for all relevant image pairs (with the exception of 0/1, 2/3 and 4/5)
5.Optional: add 2 or 3 vertical control points
6.Optimize only YPR, and check the panorama editor for problem areas
7.Generate more control points in those problem areas
8.Optimize YPR plus FoV
9.Optimize YPR plus FoV plus individual HV shift for all six tiles (if the shift values get too large, something is wrong, better undo and try something else)
10.Delete the worst control point pairs, and re-optimize, and check the panorama editor to see if the scene is coming together
11.Optimize YPR plus individual HV shift, plus VP for the problem tiles
12.Rinse and repeat steps 4-11 until you are happy with the result
13.Optimize the  exposure under the “Exposure / HDR” Tab with the Settings button
14.Alternatively, change or fine-tune the exposure compensation under the image parameters tab manually
15.Set the proper batch stitching behavior under the Project Settings Tab: check “Perform auto exposure correction” under the align images behavior, and check “Align Images” under the Batch Stitcher Actions, depending on your scene.
16.Set the proper size under the the Create Panorama Tab, including the format (jpg100 recommended)
17.Save your new template
18.Convert all your 6 videos to image sequences (jpg100), following a meaningful naming convention: “[frame number] [camera number].jpg” (assuming that all 6 video streams are in sync)
19.Use the PTgui Batch Builder use “generate new projects” with the “Multiple panoramas per folder with a fixed (6) number of images (6)” method, and pick the folder that contains all the frames of your six video streams
20.Save the batch list generated by the batch builder, and drop it into the PTgui batch builder
21.Wait for the batch stitcher to finish
22.Load the image sequence of the generated panoramas into your video editing suite to edit and produce the actual 360 video


General ideas about control points in PTgui:
关于PTGUI 控制点的一般概念:

Placing control points helps bringing those parts together. If you have a large difference between your foreground objects and your background objects in the overlap areas, you need to focus your control points on either the foreground or the background objects, since a good stitch can be mutually exclusive, in special cases. Generally, the closer an object, the harder it will be to get a good stitch, to a point where “good enough” is all you can achieve. 

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